If a huge number of people call for change, the government will have to react. If you want to avoid uprisings, or demonstrations, you need to respond to the peoples desperate need for change.

I have, as you know, the utmost respect for President Obama as a person.

Its up to any government to decide how to react to the denial of basic human rights anywhere in the world, including Egypt.

Barack Obama has injected fresh momentum into efforts - stalled for a decade - to bring about nuclear disarmament.

If we are addressing the issue of weapons of mass destruction, we need to send a uniform, consistent message that there is zero tolerance to any country who is developing weapons of mass destruction, North Korea included.

The gravest threat faced by the world is of an extremist group getting hold of nuclear weapons or materials.

I think it is fair to say that it is under a great deal of stress, and if I am asking for significant changes, it is because the world is going through significant changes.